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Ergotron LX Pro Desk Monitor Arm

The arm cheaper ones copy, rebuilt in 2025 with a lower weight ceiling than the original LX.

Monitor arms: the weight rating decides before the brand — #1

Overall

8.5

out of 10

Axis scores

Strongest on Durability (9.0), weakest on Value (7.7), a 1.3-point spread. The 8.5 overall is the plain average of all 4 Home axes, with no weighting.

Ergotron LX Pro Desk Monitor Arm — axis scores out of 10Horizontal bar chart of editorial scores out of 10 across 4 axes. Bars run from a shared zero baseline; longer is better. Ergotron LX Pro Desk Monitor Arm: Value 7.7, Durability 9.0, Ease of use 8.6, Design 8.6.ValueErgotron LX Pro Desk Monitor Arm — Value 7.7 out of 107.7DurabilityErgotron LX Pro Desk Monitor Arm — Durability 9.0 out of 109.0Ease of useErgotron LX Pro Desk Monitor Arm — Ease of use 8.6 out of 108.6DesignErgotron LX Pro Desk Monitor Arm — Design 8.6 out of 108.6Editorial score out of 10 — higher is better
  • Value — What the same money buys elsewhere
  • Durability — Failure and fade reports past the one-year mark
  • Ease of use — Setup, daily operation, cleaning, maintenance
  • Design — Build quality and how it sits in a room

Specs

Monitor weight
4 to 22 lb
Screen size
Up to 34 in
VESA
75 x 75, 100 x 100
Mechanism
Constant Force (mechanical spring)
Lift / reach
13 in lift, up to 25 in extension
Tilt
+70° / -15°
Mounting
Two-piece clamp or grommet
Warranty
10 years

As published by the manufacturer. We didn't measure these ourselves.

Is it for you

Buy it if

  • A single monitor you move several times a day, between sitting and standing
  • You want the arm to outlast the next two monitors
  • Deep desks, where 25 inches of reach lets the screen come forward

Skip it if

  • Your monitor is over 22 pounds, which includes many large ultrawides
  • You are replacing an old LX and assumed the same 25-pound rating carries over

The original LX, part 45-241-026, is discontinued, and what remains of it new is mostly third-party stock. The LX Pro replaces it. It looks nearly the same and the rating changed: 4 to 22 pounds now, against 7 to 25 before.

That lower floor is the useful change. Light 24-inch monitors used to sit near the bottom of the old range, where a spring arm drifts upward unless tensioned right at its limit. The top end shrinking by three pounds is the trade, and it matters if the screen is a heavy curved panel.

PCWorld named it the best single-monitor arm, and called out how easy it is to install and how the wide clamp spreads the load across a desktop. That spread is worth having on a laminate or particleboard top.

It uses Ergotron’s mechanical constant-force spring rather than gas. A gas strut can lose pressure over the years, so the difference shows up late. The ten-year warranty is Ergotron putting a number on the same point.

Last updated . The scoring method is on how we rank.